Compasses.



No. 709 73s." I P 7 at c. BRANDELL. d n 23, I902.

CUMPASSES.

[Application filed Apr. 8, 1902.-

(No Model.)

//v VEA/ 70/? 5. Of 'laus Brande]! BY [:RITIJIIILIZZZZ:f: H AT EYS TH:NORRIS Pz'rzns co womu'ma, WASHINGYON, n. c.

UNITED PATIENT rricn.

CLAUS BRANDELL, OF CHICAGO, ILLINOIS.

COMPASSES.

SPECIFICATION forming part of Letters Patent No. 709,788, datedSeptember 23, 1902.

Application filed April 8, 1902. Serial No. 101,974. (No model.)

To a, who-1n it may concern:

Be it known that LOLAUs BRANDELL, a citizen of the United States, and aresident of Ghicago,in the county of Cook and State of Illinois, haveinvented new and Improved Compasses, of which the following is a full,clear, and exact description.

The invention relates to drawing instruments; and its object is toprovide a new and improved drawing-compass arranged to insure a uniformopening and closing of the legs and to cause the needle-point to standin any position of the compass parallel to the pen or pencil.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedoutin the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 isa side elevation of the improvement in a closed position.Fig. 1 is alike View of the pencil for use in the instrument shown inFig. 1. Fig. 2 is an edge view of the same. Fig. 31's a side elevationof the same in an open position. Fig. 4 is an enlarged sectional sideelevation of the same in a closed position substantially on the line 4 4of Fig. 2. Fig. 5 is a similar view of the same in an open position.Fig. 6 is a side elevation of one of the parallel bars. Fig. 7 is asimilar view of one of the legs, and Fig. 8 is a side elevation of theextension-bar.

The head of the compass is preferably made in inverted-U shape, and tothe top of the head is secured an upwardly-extending handle D, and inthe sides of the head are fastened the spaced transverse pivots O O, onwhich are pivoted the legs D D, respectively, of which the legD ispivotally connected with the needle-point E and the leg D is pivotallyconnected with the head F, carrying the pen or pencil F or other markingdevice. The

heel or pivotal ends of the legs D and D are provided with segmentalgear-wheels D in mesh with each other, as plainly illustrated in Figs.4, 5, and 7, so that the legs move simultaneously into an open or closedposition. On the pivot C is also pivoted the parallel bar G, pivotallyconnected with the point E, adjacent to the pivotal connection of theleg D with the said point, and the said parallel bar G is provided witha segmental slot G through which extends the pivot O. A parallel bar Gis pivotally connected with the head F and pivoted on the pivot O and isprovided with a segmental slot G through which extends loosely the pivotC. Now by reference to Figs. 1 and 3 it will be seen-that the pivotalconnections between the legsD D and the parallel bars G G with theneedle-point E and the head F are arranged in the same horizontal plane,so that when the legs D D are swung apart the parallel bars G G hold theneedle-point E and the pen or pencil F in parallel positions, as will bereadily understood by reference to Fig. 3. Thus when the legs are in anopen or closed position the pen or pencil F stands at all times parallelto the needle-point E.

The shank of the pen or pencil F is seen red in the head F in the usualmanner bya setscrew F and when it is desired to employ a lengthening barH then the pen or pencil is removed from the head F 'and the latter isengaged by the shank H of the lengthening bar H, secured in position bythe set-screw F The lengthening bar H is preferably of the eX- tensionkind-that is,is provided with a bar 1-1 slidable in the tubularlengthening bar H and adapted to be secured therein by a set-screw H 011the outer end of the lengthening bar 11 is formed a head or socket H forreceiving the shank of a pen or pencil similar to the pen or pencil F,but somewhat shorter, the said shank being adapted to be engaged by asetscrew H to secure the pen or pencil in position on the head H Now thelengthening bar H stands at right angles to its shank H;

and the pen or pencil secured to the head H stands at right angles tothe lengthening bar H, and when the compass is opened or closed the penor pencil will stand parallel to the needle-pointE,the same as if thelengthening bar had not been used. It will further be seen that by thearrangement described the handle B stands parallel at all times to theneedlepoint and pen to allow convenient turning to describe the desiredcircle or segment.

From the foregoing it will be seen that the compass is very simple anddurable in con- Patent- 1. A compass comprising a head having spacedtransverse pivots, legs pivoted on the said pivots and mounted to swingin unison, a point pivoted on one leg, a bar pivotally connecting thesaid point with the said head, a marking device pivoted on the otherleg, and a second bar pivotally connecting the marking device with thesaid head, as set forth.

2. A compass comprising a head carrying spaced pivots, legs pivoted onthe pivots and having gear-segments in mesh with each other, a pointpivoted on one leg, a bar connecting the saidpoint with one of thepivots, a marking device pivoted on the other leg, and a second barconnecting the said marking device with the other pivot, as set forth.

3. A compass, comprising a head carrying spaced pivots, legs pivotedthereon and having their heels in mesh with each other, a point pivotedon one of the legs, a marking device pivoted on the other leg, and bars,of which one is pivotally connected with the needle-point and with thepivot for the other leg, and the other bar is pivoted on the pivot forthe leg carrying the needle-point and is pivotally connected with themarking device, as set forth.

4:. A compass, comprising a head carrying spaced pivots, legs pivotedthereon and having their heels in mesh with each other, a point pivotedon one of the legs, a marking device pivoted on the other leg, and bars,of which one is pivotally connected with the needle-point and with thepivot for the other leg, and the other bar is pivoted on the pivot forthe leg carrying the needle-point and is pivotally connected with themarking device, the pivotal ends of the said bars having segmental slotsfor engaging the pivots, as set forth.

5. A compass, comprising a head carrying spaced pivots, legs pivotedthereon and having their heels in mesh with each other, a point pivotedon oneof the legs, a marking device pivoted on the otherleg, bars, ofwhich one is pivotally connected with the needlepoint and with the pivotfor the other leg, and the other bar is pivoted on the pivot for the legcarrying the needle-point and is pivotally connected With the markingdevice, and a horizontal lengthening bar for the marking device, as setforth.

0. A compass, comprising a head carrying spaced pivots, legs pivotedthereon and having their heels in mesh with each other, a point pivotedon one of the legs, a marking device pivoted on the other leg, bars, ofwhich one is pivotally connected With the needlepoint and with the pivotfor the other leg, and the other bar is pivoted on the pivot for the legcarrying the needle-point and is pivotally connected with the markingdevice, and a horizontal lengthening bar for the marking device, thelengthening bar having an extension-bar, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

GLAUS BRANDELL.

Witnesses:

GEORGE A. SWANSON, GUSTAVE A. PETERSON.

